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The interplay between motion perception and perceptual completion.

Grace S Kurian1, Chrysa Retsa1, Mark T Wallace2

  • 1The Radiology Department, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland; The Sense Innovation and Research Center, Lausanne and Sion, Switzerland.

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|November 21, 2025
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Summary
This summary is machine-generated.

Individuals adept at motion discrimination show distinct visual evoked potential (VEP) responses related to illusory contours (ICs). This suggests motion perception influences perceptual completion, impacting IC effects.

Keywords:
CompletionEvent-related potential (ERP)Illusory contourLoomingMotionPerceptionVisualvisual evoked potential (VEP)

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Area of Science:

  • Neuroscience
  • Visual Perception
  • Cognitive Science

Background:

  • Effective visual perception requires overcoming noise and dynamic changes, often studied using illusory contour (IC) stimuli.
  • Visual evoked potentials (VEPs) reveal an IC effect, a distinct brain response to ICs.
  • The contribution of motion signals to perceptual completion remains unclear.

Purpose of the Study:

  • To investigate how motion perception and discrimination abilities influence the illusory contour effect (IC effect).
  • To explore the neural underpinnings of perceptual completion in relation to motion processing.

Main Methods:

  • Recorded 128-channel VEPs from 20 healthy adults performing a motion detection task.
  • Participants were categorized as "adept" or "non-adept" based on motion discrimination performance.
  • Analyzed VEP topographies and correlated them with motion discrimination accuracy.

Main Results:

  • "Adept" individuals exhibited distinct VEP topographies for moving versus static stimuli, unlike "non-adept" individuals.
  • VEP topography during IC perception positively correlated with motion discrimination accuracy.
  • Source modeling identified involvement of occipital, temporal, and frontal cortical regions.

Conclusions:

  • Motion discrimination capability significantly modulates visual evoked potential responses associated with illusory contour perception.
  • These findings underscore the interplay between motion processing and higher-level perceptual completion mechanisms.
  • Both low-level and high-level cortical areas are crucial for integrating motion cues into illusory contour perception.